Welch^® ChemStar^® vacuum pump 

General-purpose pumps are ideal for vacuum distillations, concentrating, drying, and degassing applications. Operate at a low rpm resulting in cooler operating temperatures and longer service life compared to higher rpm pumps.
Model 1400 specifications:
Pumping speed, 0.9 cfm (25 L/min)
Max. vacuum, 1 × 10^-4 torr
Oil capacity, 0.62 qt (0.59 L)
Tubing needed, I.D. 7/16 in.
Exhaust and intake thread type, 3/4-20
Electrical requirements, 115V AC/60Hz
rpm, 580
Dim., L × W × H, 17.8 × 9 × 12.61 in. (45.1 × 22.9 × 32.1 cm)
Wt, 58 lb (26 kg)

Model 1405 specifications:
Pumping speed, 2.1 cfm (60 L/min)
Max. vacuum, 3 × 10^-4 torr
Oil capacity, 0.43 qt (0.41 L)
Tubing needed, I.D. 7/16 in.
Exhaust and intake thread type, 3/4-20
Electrical requirements, 115V AC/60Hz
rpm, 525
Dim., L × W × H, 5 × 13 × 18 in. (38 × 33 × 46.8 cm)
Wt, 93 lb (42 kg)

Model 1402N* specifications:
Pumping speed, 5.6 cfm (160 L/min)
Max. vacuum, 1 × 10^-4 torr
Oil capacity, 2.25 qt (2.1 L)
Tubing needed, I.D. 13/16 in.
Exhaust and intake thread type, 1-20
Electrical requirements, 115V AC/60Hz
rpm, 525
Dim., L × W × H, 20 × 12 × 15 in. (51 × 30.5 × 38.1 cm)
Wt, 112 lb (51 kg)
* Explosion-proof motor.

ChemStar is a registered trademark of Welch Vacuum Technology.

Welch is a registered trademark of Welch Vacuum Technology.